KR101560658B1 - Stereoscopic lens sheet comprising multiple nano structure for expressing three dimensional color image - Google Patents

Abstract

The present invention relates to a three-dimensional lens sheet, and more particularly to a three-dimensional lens sheet comprising a micro lens in which a plurality of semicircular convex lenses are arranged in parallel, or a plurality of semicircular convex lenses are arranged continuously, ; A focal length layer disposed under the stereolithographic lens layer; And an image forming layer provided below the focal length layer, wherein the image forming layer includes an aggregate in which a plurality of nanostructures are periodically and regularly arranged, and between the nanostructure and the focal length layer, Structure and a medium having a refractive index different from that of the focal length layer.
According to the three-dimensional lens sheet including a plurality of nanostructures proposed in the present invention and representing a stereoscopic color image, in a three-dimensional lens sheet including a three-dimensional lens layer, a focal length layer, and an image-forming layer, a plurality of nanostructures And the nanostructure and the focal length layer are formed of a medium having a refractive index different from that of the nanostructure and the focal length layer, it is possible to obtain a desired color and Shape image can be implemented and can be displayed on a single plate without superimposing color and shape representation up to 10 micron nano units and the expression of single color and full color in color representation can be made according to the structure design.

Description

TECHNICAL FIELD [0001] The present invention relates to a stereoscopic lens sheet including a plurality of nanostructures,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional lens sheet, and more particularly, to a three-dimensional lens sheet including a plurality of nanostructures to express stereoscopic color images.

The three-dimensional lens sheet is a three-dimensional image reconstructing a 2D image using a lenticular lens or a microlens by utilizing the illusion effect principle due to binocular parallax. Conventionally, a stereoscopic image representation method using a three-dimensional lens sheet uses a lenticular lens or a microlens on an image represented by a dye or a pigment to utilize a stereoscopic effect and various conversion effects of the image. In other words, Binocular Disparity, which is caused by the presence of the human eye at a distance of about 65mm in the lateral direction, is used as the most important factor for feeling the three-dimensional effect. When a three-dimensional lens is used, By using the forward effect, the effect of the three-dimensional stereoscopic image can be obtained with the two-dimensional plane image.

In the three-dimensional sheet, the image is positioned at the bottom of the lens layer and is expressed through a print layer formed of a dye or pigment (see Utility Model Registration Application No. 20-2003-0002405). Thus, There is a problem of discoloration due to ultraviolet rays of a dye or a pigment. Further, in order to obtain a stereoscopic shape by providing a stereoscopic lens on the printing surface, there is a problem that it is difficult to obtain a desired image by overlapping halftone dots.

On the other hand, feathers of butterflies and birds exhibit distinctive colors without having pigment, which is manifested by diffraction, interference, and scattering of light by a specific structure. That is, when light is irradiated on fine wrinkles or regularly arranged structures, only the light of a specific wavelength is reflected to express the color of the corresponding wavelength. The present inventors focused on the concept of such a structural color and wanted to develop a three-dimensional lens sheet which expresses stereoscopic color images which are not precisely deformed through structural design without using dyes or pigments.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems of the previously proposed methods. In the three-dimensional lens sheet including the three-dimensional lens layer, the focal length layer and the image forming layer, a plurality of nanostructures are periodically and regularly And the nanostructure and the focal length layer are formed of a medium having a refractive index different from that of the nanostructure and the focal length layer. Thus, the image of the desired color and shape can be obtained only by the structural design without using the dye or pigment. Can be implemented, and can be expressed on a single plate without superimposing color and shape representations up to 10 micron sub-nano units, and the expression of single color and full color in color representation can be realized by a plurality of nanostructures The object of the present invention is to provide a three-dimensional lens sheet that expresses a hidden image .

According to an aspect of the present invention, there is provided a stereoscopic lens sheet including a plurality of nanostructures,

A three-dimensional lens layer comprising a lenticular lens in which a plurality of semicircular convex lenses are arranged in parallel, or a microlens in which a plurality of semicircular convex lenses are continuously arranged;

A focal length layer disposed under the stereolithographic lens layer; And

And an image forming layer provided below the focal length layer,

Wherein the image forming layer includes an aggregate in which a plurality of nanostructures are periodically and regularly arranged,

And the structure between the nanostructure and the focal length layer is composed of a medium having a refractive index different from that of the nanostructure and the focal length layer.

Preferably,

Wherein the plurality of nanostructures are protruded at intervals and height of 50 to 200 nanometers, and the height of the nanostructures is smaller than the pitch distance between the nanostructures,

The interval, height, and shape of each of the nanostructures may be formed so that the wavelength reflected by the nanostructure upon natural light irradiation corresponds to a color to be expressed.

Preferably, part or all of the plurality of nanostructures is

A plurality of nanostructures may be stacked.

Preferably,

The nanostructure may be formed from a group including polyethylene terephthalate (PET), polycarbonate (PC), UV resin, epoxy resin, and acrylic resin At least one selected from the group consisting of:

Between the nanostructure and the focal length layer may be air or vacuum.

Preferably,

And a planar coating layer coated on the upper surface of the three-dimensional lens layer so as to be flat.

Preferably,

And a light shielding layer disposed under the image forming layer.

Preferably, the stereolithographic lens layer is formed by:

A first lenticular lens having a plurality of semicircular convex lenses arranged in parallel and a second lenticular lens having a curved surface facing the first lenticular lens,

The busbars of the semicylindrical convex lenses arranged in the first lenticular lens and the second lenticular lens may be staggered from each other.

According to an aspect of the present invention,

A three-dimensional lens sheet including a plurality of nanostructures to express stereoscopic color images;

An adhesive layer formed on the image-forming layer or the light-shielding layer of the three-dimensional lens sheet; And

And a release film formed on an upper portion of the three-dimensional lens layer of the three-dimensional lens sheet.

According to an aspect of the present invention,

And transferring the three-dimensional lens sheet onto the surface of the molded article using the transfer material.

According to the three-dimensional lens sheet including a plurality of nanostructures proposed in the present invention and representing a stereoscopic color image, in a three-dimensional lens sheet including a three-dimensional lens layer, a focal length layer, and an image-forming layer, a plurality of nanostructures And the nanostructure and the focal length layer are formed of a medium having a refractive index different from that of the nanostructure and the focal length layer, it is possible to obtain a desired color and Shape image can be implemented and can be displayed on a single plate without superimposing color and shape representation up to 10 micron nano units and the expression of single color and full color in color representation can be made according to the structure design.

1 is a view showing a conventional three-dimensional lens sheet.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a three-dimensional (2D) color image sensor.
3 is a view showing a specific configuration of an image-forming layer in a three-dimensional lens sheet including a plurality of nanostructures according to an embodiment of the present invention to express stereoscopic color images.
4 is a view showing a configuration of a three-dimensional lens sheet including a plurality of nanostructures according to another embodiment of the present invention, the three-dimensional color image representing the three-dimensional color image.
5 is a view showing the configuration of a three-dimensional lens sheet including a plurality of nanostructures according to another embodiment of the present invention, which represents a three-dimensional color image.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. In the following detailed description of the preferred embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The same or similar reference numerals are used throughout the drawings for portions having similar functions and functions.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to "include" an element means that it may include other elements, rather than excluding other elements, unless specifically stated otherwise.

1 is a view showing a conventional three-dimensional lens sheet. As shown in FIG. 1, when a two-dimensional image (ㅇ ㅁ) is positioned below a three-dimensional lens composed of a plurality of semicircular convex lenses, light refraction occurs due to the bending of the three-dimensional lens. Binocular disparity ) Is recognized as a three-dimensional image by the optical illusion effect principle. In this case, a two-dimensional image is generally colored with a dye or a pigment. Such a dye or pigment has a problem of discoloration due to ultraviolet rays or the like. In order to obtain a three-dimensional shape by providing a stereoscopic lens on a printing surface, Is difficult to obtain.

FIG. 2 is a view illustrating the configuration of a three-dimensional lens sheet including a plurality of nanostructures according to an exemplary embodiment of the present invention. FIG. 2, a three-dimensional lens sheet including a plurality of nanostructures according to an exemplary embodiment of the present invention, the three-dimensional lens sheet including a three-dimensional lens layer 100, a focal length layer 200, (300).

The stereoscopic lens layer 100 may include a lenticular lens 110 in which a plurality of semicircular convex lenses are arranged in parallel or a microlens 120 in which a plurality of semicircular convex lenses are continuously arranged. The convex lens may be formed with a predetermined refractive index and the cross section may be formed with an aspherical surface. According to an embodiment of the present invention, unlike the general stereoscopic lens layer, the cross section can be formed as an aspheric surface having an extremely high angle of view. By adopting such a configuration, when the flat coating layer 400 having a low refractive index is coated on the surface of the lens sheet, a phenomenon that the angle of view becomes narrow due to the double refractive index can be solved. Further, by configuring it as an aspheric surface, the focal length can be adjusted. When the power of the lens is increased, the focal distance is shortened. When the power is small, the focal distance becomes long, so the power is increased to thin the lens.

The focal length layer 200 may be provided below the three-dimensional lens layer 100 to match the focal length corresponding to the radius of curvature. That is, the focal length layer 200 having an appropriate thickness can be formed according to the curvature, the thickness, the size of the image, the size and position of the stereoscopic color image to be displayed, and the like.

The image forming layer 300 may be formed at a lower portion of the focal length layer 200 and may include a plurality of nanostructures 310 arranged periodically and regularly. The distance layer 200 may include a medium 320 having a refractive index different from that of the nanostructure 310 and the focal length layer 200.

Preferably, the plurality of nanostructures 310 may protrude at an interval of 50 to 200 nanometers, and the height of the nanostructures 310 may be less than a pitch distance between the nanostructures. More preferably, the height of the nanostructure 310 is 50 to 100 nm, and the pitch distance between the nanostructures is 150 to 200 nm.

The interval, height, and shape of each of the nanostructures 310 may be formed so that the wavelength of light reflected by the nanostructure 310 when natural light is irradiated corresponds to the color to be expressed. That is, the nanostructures 310 may be formed at predetermined pitch distances (intervals), and may be formed at a predetermined height, and such intervals and heights may be determined according to a pattern or color display reference according to the light reflection wavelength .

3 is a view illustrating a specific configuration of an image forming layer in a three-dimensional lens sheet including a plurality of nanostructures according to an exemplary embodiment of the present invention. As shown in FIG. 3, light may be refracted or reflected by the nanostructures 310 and recognized as a specific color by the reflected light. In addition, a part or all of the plurality of nanostructures 310 may be formed by stacking a plurality of nanostructures 310, and the laminated structure may be formed of a material having a different refractive index, It is also possible to stagger the left and right sides by a predetermined width. The shape of the nanostructure 310 of FIG. 3 is merely an example, and various nano-sized structures may be formed to display images according to light reflection wavelengths.

The nanostructure 310 in the three-dimensional lens sheet including a plurality of nanostructures according to an embodiment of the present invention may be formed of a material selected from the group consisting of polyethylene terephthalate (PET), polycarbonate (PC) , Ultraviolet resin (UV Resin), epoxy resin (Epoxy Resin), and acrylic resin (Acryl Resin). The nano structure 310 and the focal length layer 200 may be air or vacuum. In the case of air or vacuum, an outer coating (not shown) for forming the outer surface of the three-dimensional lens sheet should be provided.

In the present invention, a method of representing a color image through the structural design of the nanostructure 310 is adopted. A stereoscopic lens layer 100 and a focal length layer 200 are coupled to the upper portion of the color image forming layer 300 The nanostructure 310 is formed inside the lens sheet, so that the shape of the nanostructure 310 can be maintained and protected from the external environment without a separate protective layer. That is, the present invention adopts a structure in which the three-dimensional lens layer 100 and the like are provided on the nanostructure 310, so that the color image can be expressed very stably and effectively.

FIG. 4 is a view illustrating the configuration of a three-dimensional lens sheet including a plurality of nanostructures according to another embodiment of the present invention to express stereoscopic color images. As shown in FIG. 4, according to another embodiment of the present invention, it may further comprise a planar coating layer 400 coated to flatten the upper surface. As described above, the stereoscopic lens layer 100 has a configuration for obtaining a three-dimensional image effect using the binocular parallax, and the surface of the lenticular lens 110 or the microlens 120 is bent. Therefore, the lens surface is likely to be contaminated, friction is frequently generated only on the convex portion, the degree of wear varies depending on the lens portion, and a curvature different from the original curvature is formed, . According to another embodiment of the present invention, the above-described problem can be solved by further providing the flat coating layer 400 on the upper surface forming the curved surface in the stereoscopic lens layer 100. The planar coating layer 400 may be formed of a transparent resin having a refractive index different from that of the three-dimensional lens layer 100 so that the surface of the planar coating layer 400 may be flattened while maintaining the refraction due to bending of the three- .

In addition, the three-dimensional lens sheet including a plurality of nanostructures according to another embodiment of the present invention may further include a light shielding layer 500 disposed under the image forming layer 300 It is possible. As described above with reference to FIG. 3, the present invention forms an image through a color that appears as light is reflected from the nanostructure 310, so that the light shielding layer 500 is further included below the nanostructure 310, A light reflection effect can be utilized.

FIG. 5 is a view illustrating the configuration of a three-dimensional lens sheet including a plurality of nanostructures according to another embodiment of the present invention. FIG. 5, in a three-dimensional lens sheet including a plurality of nanostructures according to another embodiment of the present invention, the three-dimensional lens layer 100 includes a plurality of semicircular convex lenses And a second lenticular lens 112 having a curved surface facing the first lenticular lens 111. The first lenticular lens 111 and the second lenticular lens 112 are disposed in parallel with each other, The convex lens of the semicircular mold arranged in the second lenticular lens 112 may be formed to be staggered from each other.

The general semicircular mold lenticular lens 110 has a stereoscopic effect expressed by a vertical pattern binocular parallax system, but a radial microlens can secure a binocular binocular parallax. In another embodiment of the present invention, the mother lobes of the two lenticular lenses 111 and 112, which have curved surfaces facing each other, are staggered from each other, so that a three-dimensional effect can be obtained in various directions. That is, without the separate planar coating layer 400, the upper surface of the lens can be formed flat, and the effect of the microlenses can be obtained. The angle between the busbars is preferably 45 degrees, 60 degrees, or 90 degrees, but the present invention is not limited thereto and can be modified according to the embodiment.

According to another aspect of the present invention, there is provided a stereoscopic image display apparatus including: a stereoscopic lens sheet including a plurality of nanostructures according to an embodiment of the present invention; And a release film formed on the top of the release film.

The adhesive layer may be formed under the image-forming layer 300 or the light-shielding layer 500 of the three-dimensional lens sheet, and may serve to fix and attach the three-dimensional lens sheet to the molded article. Depending on the embodiment, it can be formed using various known thermosensitive or pressure-sensitive resins, and specific examples thereof include a polyacrylic resin, a polystyrene resin, a polyamide resin, a chlorinated polyolefin resin, a chlorinated ethylene- Resin or rubber-based resin.

The release film can be formed at the uppermost end of the three-dimensional lens sheet as being peeled off after adhering to a molded product. Depending on the embodiment, it is possible to use a resin film composed mainly of a polypropylene resin, a polyethylene resin, a polyamide resin, a polyester resin, a polyacrylic resin or a polyvinyl chloride resin and a metal foil such as an aluminum foil or a copper foil, A releasing film can be formed by forming a releasing layer by performing a releasing treatment on one side of a cellulose sheet based on a cellulose sheet such as polyethylene terephthalate, have. In this case, the mold releasing treatment method for forming the release layer is not particularly limited, and examples thereof include epoxy, melamine, Paraffin type or a combination of two or more kinds of the above releasing agents, a coating method, or the like.

The three-dimensional lens sheet proposed in the present invention can be used in such a manner that the transfer material can further be constituted by further including an adhesive layer and a release film and transferred to the surface of a desired molded article.

As a method of transferring a transfer material including a three-dimensional lens sheet according to an embodiment of the present invention to a molded article, an adhesive layer of a transfer material is placed so as to be in contact with the surface of the molded article, and a temperature of about 80 to 260 degrees, When heat and pressure are applied to the releasing film side by a transferring machine such as a heat resistant rubber-like elastic body under the condition of 200 kg / m < 2 >, and then the releasing film is peeled off after the cooling step, peeling occurs at the interface between the solid lens sheet and the releasing film, Can be transferred to the surface of the molded article. This is an example only, and the three-dimensional lens sheet can be transferred to the molded product by various methods such as a mold injection method.

The present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics and scope of the invention.

100: a three-dimensional lens layer 110: a lenticular lens
111: first lenticular lens 112: second lenticular lens
120: micro lens 200: focal length layer
300: image forming layer 310: nano structure
320: nanostructures and focal-length layers and media with different refractive indices
400: plane coating layer 500: light shielding layer

Claims (9)

As a three-dimensional lens sheet,
A three-dimensional lens layer comprising a lenticular lens in which a plurality of semicircular convex lenses are arranged in parallel, or a microlens in which a plurality of semicircular convex lenses are continuously arranged;
A focal length layer disposed under the stereolithographic lens layer; And
And an image forming layer provided below the focal length layer,
Wherein the image forming layer includes an aggregate in which a plurality of nanostructures are periodically and regularly arranged,
Wherein the nanostructure and the focal length layer are composed of a medium having a refractive index different from that of the nanostructure and the focal length layer,
The nanostructure may be formed from a group including polyethylene terephthalate (PET), polycarbonate (PC), UV resin, epoxy resin, and acrylic resin At least one selected from the group consisting of:
Wherein the nano structure and the focal length layer are constituted by air or vacuum. The three-dimensional lens sheet according to claim 1, wherein the three-dimensional color image comprises a plurality of nanostructures.
The method according to claim 1,
Wherein the plurality of nanostructures are protruded at intervals and height of 50 to 200 nanometers, and the height of the nanostructures is smaller than the pitch distance between the nanostructures,
Wherein the interval, height, and shape of each of the nanostructures are formed so that a wavelength of light reflected upon natural light irradiation of the nanostructure corresponds to a color to be expressed, wherein the plurality of nanostructures include a plurality of nanostructures, Three-dimensional lens sheet.
The nanostructure according to claim 1,
A three-dimensional lens sheet comprising a plurality of nanostructures, wherein the plurality of nanostructures are stacked.
delete The method according to claim 1,
The stereoscopic lens sheet according to claim 1, further comprising a flat coating layer coated on the upper surface of the stereolithographic lens layer so as to be flattened.
The method according to claim 1,
And a light shielding layer provided on a lower portion of the image forming layer, wherein the light shielding layer includes a plurality of nanostructures.
The liquid crystal display device according to claim 1,
A first lenticular lens having a plurality of semicircular convex lenses arranged in parallel and a second lenticular lens having a curved surface facing the first lenticular lens,
Wherein the busbars of the semicylindrical convex lenses arranged in the first lenticular lens and the second lenticular lens are formed staggered from each other, the three-dimensional color image comprising a plurality of nanostructures.
A stereolithographic lens sheet according to any one of claims 1, 2, 3, 5, 6, and 7;
An adhesive layer formed on the image-forming layer or the light-shielding layer of the three-dimensional lens sheet; And
And a release film formed on an upper portion of the three-dimensional lens layer of the three-dimensional lens sheet.
A transfer method comprising the step of transferring a three-dimensional lens sheet onto the surface of a molded article using the transfer material according to claim 8.

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